'antiphilosophically' originates from Greek and Late Latin elements: specifically the Greek prefix 'anti-' (from Greek 'anti' meaning 'against') combined with 'philosophia' (Greek 'philosophia' meaning 'love of wisdom' → 'philosophy') plus the English adjectival/derivational suffixes '-ical' and adverbial suffix '-ly'.

'antiphilosophically' developed in English by combining the prefix 'anti-' with the adjective 'philosophical' (from Latin/Old French forms of Greek 'philosophia'), and then forming the adverb with the Old English/English suffix '-ly', yielding the modern adverb 'antiphilosophically'.

Initially formed simply to express being 'against philosophy' or 'against philosophical approaches'; over time it has been used to mean more generally 'in a manner opposed to philosophical reasoning or methods', often contrasting practical or rhetorical approaches with reflective philosophical methods.